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                            <b>5.14.</b>
                        
                        第14章：DOM修改样式
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        width: 100px;
        height: 100px;
        background-color: skyblue !important;
        transform: translateX(100px);
    }
    .col{
        color: white;
    }
</code></pre><p>js&#x4EE3;&#x7801;&#xFF1A;</p>
<pre><code>
    var div = document.getElementById(&quot;box1&quot;);

    // &#x8BBE;&#x7F6E;&#x8282;&#x70B9;&#x7684;&#x5C5E;&#x6027;
    div.id = &quot;id123&quot;;
    console.log(div.className)                    // box
    console.log(div.nodeName)                    // DIV

    // &#x83B7;&#x53D6;&#x5C5E;&#x6027;
    console.log(&quot;&#x83B7;&#x53D6;&#x5C5E;&#x6027;&#xFF1A;&quot;,div.getAttribute(&quot;id&quot;))
    console.log(&quot;&#x8BBE;&#x7F6E;&#x5C5E;&#x6027;&#xFF1A;&quot;,div.setAttribute(&quot;style&quot;,&quot;color: white;&quot;))

    // &#x5220;&#x9664;&#x5C5E;&#x6027;,&#x8FDE;&#x5C5E;&#x6027;&#x7684;&#x540D;&#x79F0;&#x4E5F;&#x53BB;&#x9664;
    div.removeAttribute(&quot;style&quot;);

    // &#x7C7B;&#x540D;
    div.className += &quot; active&quot;;
    // classList &#x8868;&#x793A;&#x5143;&#x7D20;&#x5305;&#x542B;&#x7684;class&#x7684;&#x5217;&#x8868;&#xFF0C;value&#x8868;&#x793A;&#x539F;&#x672C;class&#x7684;&#x503C;
    console.log(div.classList)
    // &#x6DFB;&#x52A0;&#x7C7B;&#x540D;
    //div.classList.add(&quot;fz30&quot;);
    // &#x79FB;&#x9664;&#x7C7B;&#x540D;
    //div.classList.remove(&quot;active&quot;);

    // &#x7EC3;&#x4E60;&#xFF1A;&#x901A;&#x8FC7;&#x70B9;&#x51FB;button&#x63A7;&#x5236;div&#x6DFB;&#x52A0;&#x6216;&#x5220;&#x9664;&#x67D0;&#x4E2A;&#x7C7B;&#x540D;&#xFF0C;&#x8FDB;&#x884C;&#x5207;&#x6362;
    function showDiv(){
        /**********************************
        if(div.className.indexOf(&quot;col&quot;) == -1){
            // &#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x6DFB;&#x52A0;&#x7C7B;&#x540D;
            div.classList.add(&quot;col&quot;);
        }else{
            // &#x5B58;&#x5728;&#xFF0C;&#x5220;&#x9664;&#x7C7B;&#x540D;
            div.classList.remove(&quot;col&quot;);
        }
        **********************************/

        // &#x5207;&#x6362;&#x7C7B;&#x540D;
        div.classList.toggle(&quot;col&quot;);
    }



    // &#x8BBE;&#x7F6E;&#x884C;&#x5185;&#x6837;&#x5F0F;
    div.style.fontSize = &quot;30px&quot;;
    div.style.backgroundColor = &quot;orange&quot;;
    // !important
    //console.log(div.style.backgroundColor)

    // &#x6700;&#x7EC8;&#x6E32;&#x67D3;&#x7684;&#x6837;&#x5F0F;
    //console.log(window.getComputedStyle(div).backgroundColor)
    //console.log(div.currentStyle)

    function getStyle( element,style ){
        if(window.getComputedStyle){
            // IE7&#x4EE5;&#x4E0A;    &#x652F;&#x6301;getComputedStyle
            if(style == &quot;float&quot;){
                style = &quot;cssFloat&quot;;
            }
            return window.getComputedStyle(element)[style];
        }else{
            // IE7&#x53CA;&#x4EE5;&#x4E0B;
            if(style == &quot;float&quot;){
                style = &quot;styleFloat&quot;;
            }
            return element.currentStyle[style];
        }
    }
    // &#x6700;&#x7EC8;&#x6837;&#x5F0F; &#x6D6E;&#x52A8;&#x7684;&#x5C5E;&#x6027;&#x540D;&#x5728;&#x4E0D;&#x540C;&#x7684;&#x6D4F;&#x89C8;&#x5668;&#x4F1A;&#x4E0D;&#x4E00;&#x6837;
    // &#x53D8;&#x5F62;tranform&#x7684;&#x503C;&#x662F;&#x4EE5;&#x77E9;&#x9635;&#x65B9;&#x5F0F;&#x663E;&#x793A;
    console.log(getStyle(div,&quot;float&quot;))
</code></pre>
                    
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